231 
branch of the median, 3,, of O. Hiibneri, which also tends still more 
fully to prove that the lower discoidal, theoretically speaking, forms 
part of the system of the median vein. The costal area is furnished 
near the base beneath with a strong hirsute lobe, through which the 
long bristle or bridle at the base of the costa of the hind wings 
passes. These latter wings agree with the fore ones in being desti- 
tute of the upper branch of the fork, formed by the 3rd branch of 
the median vein in O. Saundersii. In all the wings, moreover, the 
discoidal cell is only traversed by a simple longitudinal veinlet, 
whereas this is forked in the last-named species. 
Orxeticus Lewin. (Pl. XXXVII. fig. 1 and details.) 
Mas. Fuscus; capite antice, fasciis duabus longitudinalibus 
thoracis, squamulisque ad basin alarum griseo-hirtis ; alis 
fuliginosis, venis, presertim anticarum, fusco-hirtis, pene fulvo ; 
antennis ad apicem bipectinatis. 
Expans. alar. antic. unc. 14. 
Femina. Aptera, grossa, subalbida, obscura, segmentis thoracis 
glabris, fulvis, carinatis, 1mo subcueullato ; antennis brevibus, 
ewarticulatis, pedibus minimis, tuberculiformibus, (parte postica 
corporis deterita). 
Habitaculum elongatum, subcylindricum, extus ramulis fere habv- 
taculi longitudine, longitudinaliter omnino affixis, obtectum. 
Hab. in Australia (D. Stephenson). In Mus. D. W. W. Saunders. 
The males of this species at once differ from those of the preceding 
by the dark smoky colour of the wings, and the still darker colour of 
their veins, as well as of the antennz, which are bipectinated to the 
tip; they consist of thirty-nine joints, of which the two thickened 
basal ones and the two at the apex are simple, the pectinations gra- 
dually shortening to the thirty-seventh joint. The veining of the 
wings nearly accords with that of O. Saundersii, although they are 
of a shorter form, and the hind ones are not lobed at the anal angle. 
The fore legs are long and slender, the tibiee furnished with an 
elongated spur at the base, and the hind legs are much shorter and 
thicker. 
Figs. 1f & lg represent the anterior portion of a specimen indicated 
as a ‘female which had deposited ova.”” The head is small, with two 
projections at the anterior angles, which do not appear to be either 
articulated at the base or along their length ; on either side is a small 
dark spot representing the eyes ; the thoracic segments are very glossy 
and produced into a sharp carina down the middle, the first segment 
behind the head being almost cucullated. The legs are very minute, 
rudimental, and apparently exarticulate. 
The case is cylindric, with twigs of various sizes, but generally 
nearly as long as the case, fastened throughout their whole length 
on the outside; these are not arranged with so much regularity as 
in the cases of some of the other species, and occasionally one of the 
little twigs extends considerably beyond the extremity of the case, 
as in figure le. 
The pupa of the male is nearly black and glossy, the incisions of the 
abdominal segments paler coloured; the head-case between the eyes 
